LTMFX vs. FMNDX

Last updated Jun 4, 2026

LTMFX (Thornburg Limited Term Municipal Fund) and FMNDX (Fidelity Conservative Income Municipal Bond Fund Institutional Class) are both Municipal Bonds funds. Over the past 10 years, LTMFX returned 1.45%/yr vs 1.61%/yr for FMNDX. At a 0.44 correlation, their price movements are largely independent. LTMFX charges 0.71%/yr vs 0.25%/yr for FMNDX.

Performance

LTMFX vs. FMNDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Thornburg Limited Term Municipal Fund (LTMFX) and Fidelity Conservative Income Municipal Bond Fund Institutional Class (FMNDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, LTMFX achieves a 0.82% return, which is significantly lower than FMNDX's 1.01% return. Over the past 10 years, LTMFX has underperformed FMNDX with an annualized return of 1.45%, while FMNDX has yielded a comparatively higher 1.61% annualized return.

LTMFX

• 1D: 0.07%
• 1M: 0.34%
• YTD: 0.82%
• 6M: 1.01%
• 1Y: 4.35%
• 3Y*: 3.80%
• 5Y*: 1.28%
• 10Y*: 1.45%

FMNDX

• 1D: 0.00%
• 1M: 0.22%
• YTD: 1.01%
• 6M: 1.38%
• 1Y: 2.96%
• 3Y*: 3.19%
• 5Y*: 2.11%
• 10Y*: 1.61%

*Multi-year figures are annualized to reflect compound growth (CAGR)

LTMFX vs. FMNDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
LTMFX Thornburg Limited Term Municipal Fund	0.82%	5.74%	1.84%	3.83%	-5.27%	-0.18%	2.97%	3.81%	1.00%	2.29%
FMNDX Fidelity Conservative Income Municipal Bond Fund Institutional Class	1.01%	3.31%	3.04%	3.37%	-0.09%	0.03%	0.86%	2.00%	1.58%	1.10%

Correlation

The correlation between LTMFX and FMNDX is 0.40, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.40
Correlation (3Y) Calculated over the trailing 3-year period	0.52
Correlation (5Y) Calculated over the trailing 5-year period	0.51
Correlation (10Y) Calculated over the trailing 10-year period	0.46
Correlation (All Time) Calculated using the full available price history since Oct 24, 2013	0.44

The correlation between LTMFX and FMNDX shifts across timeframes, from 0.40 (1 year) to 0.52 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

LTMFX vs. FMNDX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

LTMFX

LTMFX Risk / Return Rank: 68
LTMFX Sharpe Ratio Rank: 84
LTMFX Sortino Ratio Rank: 92
LTMFX Omega Ratio Rank: 96
LTMFX Calmar Ratio Rank: 36
LTMFX Martin Ratio Rank: 30

FMNDX

FMNDX Risk / Return Rank: 98
FMNDX Sharpe Ratio Rank: 93
FMNDX Sortino Ratio Rank: 99
FMNDX Omega Ratio Rank: 99
FMNDX Calmar Ratio Rank: 99
FMNDX Martin Ratio Rank: 99

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

LTMFX vs. FMNDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Thornburg Limited Term Municipal Fund (LTMFX) and Fidelity Conservative Income Municipal Bond Fund Institutional Class (FMNDX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	LTMFX	FMNDX	Difference
Sharpe ratio: Return per unit of total volatility	2.75	3.17	-0.42
Sortino ratio: Return per unit of downside risk	4.64	8.51	-3.87
Omega ratio: Gain probability vs. loss probability	1.88	3.45	-1.57
Calmar ratio: Return relative to maximum drawdown	2.23	9.99	-7.76
Martin ratio: Return relative to average drawdown	7.01	41.56	-34.55
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

LTMFX vs. FMNDX - Sharpe Ratio Comparison

The current LTMFX Sharpe Ratio is 2.75, which is comparable to the FMNDX Sharpe Ratio of 3.17. The chart below compares the historical Sharpe Ratios of LTMFX and FMNDX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	LTMFX	FMNDX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.75	3.17	-0.42
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.55	1.99	-1.44
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.64	1.78	-1.14
Sharpe Ratio (All Time) Calculated using the full available price history	0.84	1.70	-0.85

Drawdowns

LTMFX vs. FMNDX - Drawdown Comparison

The maximum LTMFX drawdown since its inception was -8.40%, which is greater than FMNDX's maximum drawdown of -1.69%. Use the drawdown chart below to compare losses from any high point for LTMFX and FMNDX.

Drawdown Indicators

	LTMFX	FMNDX	Difference
Max Drawdown Largest peak-to-trough decline	-8.40%	-1.69%	-6.71%
Max Drawdown (1Y) Largest decline over 1 year	-1.96%	-0.30%	-1.66%
Max Drawdown (3Y) Largest decline over 3 years	-2.95%	-1.09%	-1.86%
Max Drawdown (5Y) Largest decline over 5 years	-8.40%	-1.09%	-7.31%
Max Drawdown (10Y) Largest decline over 10 years	-8.40%	-1.69%	-6.71%
Current Drawdown Current decline from peak	-0.81%	0.00%	-0.81%
Average Drawdown Average peak-to-trough decline	-1.64%	-0.10%	-1.54%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.62%	0.07%	+0.55%

Volatility

LTMFX vs. FMNDX - Volatility Comparison

Thornburg Limited Term Municipal Fund (LTMFX) has a higher volatility of 0.63% compared to Fidelity Conservative Income Municipal Bond Fund Institutional Class (FMNDX) at 0.27%. This indicates that LTMFX's price experiences larger fluctuations and is considered to be riskier than FMNDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	LTMFX	FMNDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.63%	0.27%	+0.36%
Volatility (6M) Calculated over the trailing 6-month period	1.28%	0.63%	+0.65%
Volatility (1Y) Calculated over the trailing 1-year period	1.59%	0.94%	+0.65%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.35%	1.06%	+1.29%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.27%	0.91%	+1.36%

LTMFX vs. FMNDX - Expense Ratio Comparison

LTMFX has a 0.71% expense ratio, which is higher than FMNDX's 0.25% expense ratio.

Dividends

LTMFX vs. FMNDX - Dividend Comparison

LTMFX's dividend yield for the trailing twelve months is around 3.23%, more than FMNDX's 2.82% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FMNDX Fidelity Conservative Income Municipal Bond Fund Institutional Class	2.82%	2.95%	2.99%	2.60%	0.61%	0.23%	0.85%	1.58%	1.46%	1.00%	0.75%	0.38%
LTMFX Thornburg Limited Term Municipal Fund	3.23%	4.28%	3.60%	2.11%	1.62%	1.27%	1.54%	1.78%	1.83%	1.64%	1.57%	1.56%

Frequently Asked Questions

Can I hold both LTMFX and FMNDX in my portfolio?

LTMFX and FMNDX have a correlation of 0.40, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, LTMFX or FMNDX?

LTMFX has higher volatility (0.63%) compared to FMNDX (0.27%). In terms of maximum drawdown, LTMFX dropped -8.40% vs FMNDX's -1.69%.

Which has better risk-adjusted returns?

FMNDX currently has the higher Sharpe Ratio (3.17 vs 2.75), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.